The City of Rincon’s auditor found a software problem that caused the city to under-bill water customers about $27,000 over 18 months.

The glitch was one of two internal control issues that Donald Caines of Caines, Hodges & Co. PC found and suggested ways to fix in the city’s annual audit.

All water and sewer customers who use more than 9,000 gallons of water a month were charged less than they should have been. The issue affected less than 10 percent of the city’s water customers, according to City Manager Wesley Corbitt.

No one was charged too much, he said. The issue has been corrected

“It was a good catch by our auditor, who always provides us with a thorough audit,” Corbitt said.

The other issue concerned several purchases that were made in 2013 but were recorded in 2012 records. The condition was caused by an attempt to match the purchase with the period in which it was budgeted instead of when economic events occurred.

Management made changes to fix the concern.

Caines presented the audit results at the City Council’s meeting on Tuesday night.

In other action, council members agreed to hire Secure Record Solutions of Thomasville, Ga., for $16,700 to organize and retain records for the city.

Corbitt said the company will index records and securely destroy old city records, some of which contain financially sensitive information.

The company also will set up a system for future records retention. The fee covers the initial setup and a year of service, Corbitt said.

Also on Tuesday night, council members elected Levi Scott as mayor pro tem. Last year, Paul Wendelken was mayor pro tem.

Council members also agreed to spend $4,900 for a walk-through metal detection system, which will be used at the police building where the city council and city court meets. People attending city council meetings and court hearings will be screened for weapons, Corbitt said.